Coquery

Coquery is a free corpus query tool for linguists,
lexicographers, translators, and anybody who wishes to search and
analyse a text corpus. The program is available for Windows, Linux,
and Mac OS X computers.

News

September 21, 2016: Version 0.9.2a is now available for Windows. This version fixes an issue with the desktop shortcut.

May 1, 2016: Version 0.9.2 is now available.
New features:

Corpora can now be built from PDF, .docx, .odt, HTML, or
plain text files